Closure element



FIG. 1 is a front, top perspective view of the closure element, showing my new design in an open position;

FIG. 2 is a front, top perspective view thereof in a closed position;

FIG. 3 is a front elevational view thereof;

FIG. 4 is a left-side elevational view thereof, the right-side elevational view being a mirror image thereof; and,

FIG. 5 is a rear elevational view thereof. 

I claim the ornamental design for a closure element, as shown and described. 